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We develop some aspects of the theory of derivators, pointed derivators, and stable derivators. As a main result, we show that the values of a stable derivator can be canonically endowed with the structure of a triangulated category.…

Algebraic Topology · Mathematics 2014-10-01 Moritz Groth

Given a complete and (locally) cartesian closed category U, it is shown that the category of functors from the category of Weil algebras to the category U is (locally, resp.) cartesian closed. The corresponding axiomatization for…

Differential Geometry · Mathematics 2012-10-18 Hirokazu Nishimura

For a locally presentable abelian category $\mathsf B$ with a projective generator, we construct the projective derived and contraderived model structures on the category of complexes, proving in particular the existence of enough homotopy…

Category Theory · Mathematics 2021-09-13 Leonid Positselski , Jan Stovicek

We extend work of Balmer, associating filtrations of essentially small tensor triangulated categories to certain dimension functions, to the setting of actions of rigidly-compactly generated tensor triangulated categories on compactly…

Category Theory · Mathematics 2012-06-14 Greg Stevenson

In a recent collaboration, Hiroki Matsui and the author introduced a new proof of the reconstruction theorem of Bondal-Orlov and Ballard, using Matsui's construction of a ringed space associated to a triangulated category. This paper first…

Algebraic Geometry · Mathematics 2025-10-07 Daigo Ito

We show that each rigid monoidal category A over a field defines a family of universal tensor categories, which together classify all faithful monoidal functors from A to tensor categories. Each of the universal tensor categories classifies…

Category Theory · Mathematics 2022-10-18 Kevin Coulembier

We prove that a jointly conservative family of geometric functors between rigidly-compactly generated tensor triangulated categories induces a surjective map on Balmer spectra. From this we deduce a fiberwise criterion for Balmer's…

Category Theory · Mathematics 2024-09-27 Tobias Barthel , Natalia Castellana , Drew Heard , Beren Sanders

We define quasi--locally presentable categories as big unions of coreflective subcategories which are locally presentable. Under appropriate hypotheses we prove a representability theorem for exact contravariant functors defined on a…

Category Theory · Mathematics 2012-05-11 George Ciprian Modoi

We review three examples of functors from Lorentzian categories and their applications in finiteness results, singularity theorems and boundary constructions. The third example is a novel functor from the category of ordered measure spaces…

Differential Geometry · Mathematics 2023-02-22 Olaf Müller

We prove that some subquotient categories of one-sided triangulated categories are abelian. This unifies a result by Iyama-Yoshino in the case of triangulated categories and a result by Demonet-Liu in the case of exact categories.

Rings and Algebras · Mathematics 2013-02-11 Zengqiang Lin , Yang Zhang

We generalize the definition of an exact sequence of tensor categories due to Brugui\`eres and Natale, and introduce a new notion of an exact sequence of (finite) tensor categories with respect to a module category. We give three…

Quantum Algebra · Mathematics 2015-04-07 Pavel Etingof , Shlomo Gelaki

We prove that a triangulated category which is the underlying category of a stable derivator has a filtered enhancement, providing an affirmative answer to a conjecture in [3].

Category Theory · Mathematics 2018-11-20 George Ciprian Modoi

In this paper, we state and prove precise theorems on the classification of the category of (braided) categorical groups and their (braided) monoidal functors, and some applications obtained from the basic studies on monoidal functors…

Category Theory · Mathematics 2013-01-04 Nguyen Tien Quang , Nguyen Thu Thuy , Pham Thi Cuc

The main goal of this paper is to prove the following: for a triangulated category $ \underline{C}$ and $E\subset \operatorname{Obj} \underline{C}$ there exists a cohomological functor $F$ (with values in some abelian category) such that…

K-Theory and Homology · Mathematics 2016-02-01 Mikhail V. Bondarko , Vladimir A. Sosnilo

Let $R$ be a commutative ring If $\mathcal{C}_1$ and $\mathcal{C}_2$ are $R$-linear triangulated categories then we can give an obvious triangulated structure on $\mathcal{C} = \mathcal{C}_1 \oplus \mathcal{C}_2$ where $Hom_\mathcal{C}(U,…

Commutative Algebra · Mathematics 2024-04-30 Tony J. Puthenpurakal

We prove that the standard conjecture of Hodge type holds for powers of abelian threefolds. Along the way, we also prove the conjecture for powers of simple abelian variety of prime dimension over finite fields, and in other related cases…

Algebraic Geometry · Mathematics 2025-10-27 Thomas Agugliaro

In this work, it is shown that the category XMod/P of crossed modules over fixed group P is an exact category and the complete proof of the embedding theorem of XMod/P into a set valued functor category is given.

Category Theory · Mathematics 2016-11-26 Ummahan Ege Arslan , GÜlÜmsen Onarli

We give analogues of the Auslander correspondence for two classes of triangulated categories satisfying certain finiteness conditions. The first class is triangulated categories with additive generators and we consider their endomorphism…

Representation Theory · Mathematics 2020-09-23 Norihiro Hanihara

We give a classification of substructures (= closed subbifunctors) of a given skeletally small extriangulated category by using the category of defects, in a similar way to the author's classification of exact structures of a given additive…

Category Theory · Mathematics 2022-08-08 Haruhisa Enomoto

As a generalization of acyclic 2-Calabi-Yau categories, we consider 2-Calabi-Yau categories with a directed cluster-tilting subcategory; we study their cluster-tilting subcategories and the cluster combinatorics that they encode. We show…

Representation Theory · Mathematics 2016-11-14 Jan Stovicek , Adam-Christiaan van Roosmalen